CN101939810A

CN101939810A - Fuse holder

Info

Publication number: CN101939810A
Application number: CN2008801255941A
Authority: CN
Inventors: R·特瑞特奈
Original assignee: Taller GmbH
Current assignee: Taller GmbH
Priority date: 2007-12-17
Filing date: 2008-12-17
Publication date: 2011-01-05
Anticipated expiration: 2028-12-17
Also published as: CN101939810B; EP2223322A1; WO2009076941A1; EP2223322B1

Abstract

The invention relates to a low-current fuse arrangement having contacts for contacting a replaceable low-current fuse and a fuse-entraining closure enabling replacement of the low-current fuse. For this purpose, it is provided that the closure for movement of the fuse is configured between a contact position contacting the contacts and a fuse replacement position, which at least largely covers the contacts.

Description

Hook guard

Technical field

The present invention relates to the preamble object required for protection of claim and relate to a kind of hook guard thus.

Background technology

In the fuse device, hook guard is used for so fixing electric fuse such as fuse, so that can easily change this electric fuse in failure situations.Household electrical appliance and this type of fuse that is equipped with like that are to protect its infringement that is not subjected to fault, so that be limited in fault or damage the electric current that passes through this equipment in the situation.In high-quality equipment, this type of fuse must be removable.Depend on where operate corresponding apparatus, must originally be in or in attaching plug, arrange these fuses, as being exactly this situation in Britain at this equipment.

In the ordinary plug of Britain, fuse so is arranged in for it between abundant isolated attaching plug pin, so that only do not insert socket and the electric device that should operate just can remove this fuse when also separating with electrical network fully when the attaching plug pin.This may not be suitable in other are arranged.The hook guard that is provided with the spiral dead lock is known, and these hook guards can be disposed in equipment splicing ear low in calories next door and have the dead lock that can insert fuse therein.Equally, in this type of fuse device, inside contact is opened wide, and this especially may cause potential danger when children just are at play, for example when these children are incorporated into little conductive body in the opening.

Usually, known hook guard comprises two metal foil slips that are generally the U-shaped bending in this type of plug, and these metal foil slips are fixed on place, " U " shape bottom and clamp fuse with its leg.

Problem is, even also must guarantee safe contact under the situation of often carrying out change of fuse.This requires this leg to have fully big thrust at the metal end caps place of fuse usually.Yet big thrust can cause only changing fuse equally difficultly, and this for example can give and manually do have the personnel of obstacle to bring difficulty.

Also propose in addition, protecting fuse by the bearing of arranging near bottomland, not to be pressed into the U-shaped leg too dark, so that so prevent the excessive fork of the sheet metal that clamps.Also produced following problem equally herein: perhaps these metal foil slips can have a negative impact to the easy taking-up of the fuse that damages.

Wish also that in addition a kind of fuse device is provided, and it has the fail safe of misoperation of preventing and suchlike higher degree.This is equally applicable to the emerging plug of GB standard and similar standard.In these emerging plugs, in order to reach compact structure, plug pin can move to the actuated position from resting position or transmission location.Can mention patent documentation US 7,160,124 B2, US 7,144,266 and protection power WO 2007/113541 about this.

What be worth pursuit is to alleviate at least a portion in the described problem at least in part to a certain extent.

Summary of the invention

Task of the present invention is, for commercial Application provides a kind of new things.

Come the solution of claimed this task with the form of independent claims.Provide preferred embodiment in the dependent claims.

Therefore, first importance of the present invention is that the dead lock of fuse so moves, so that the contact in the change of fuse position at least to a great extent, is preferably hidden by dead lock fully between contact position and change of fuse position.Thus, not only strictly avoided extracting or casual touch to the fuse contact, but also can avoid unsafe object to be brought to fuse contact place better and cause after a while harm.

At this, the present invention proposes or additionally and/or alternatively proposes a kind of hook guard that has through the fixing metal foil slip that is used for contact fuse in addition, wherein this metal foil slip is fixed on a side, is supported in relative opposite side and is provided in contact fuse in the zone line.This class formation is regarded as preferred variation and/or this structure this is constructed under rotating cylinder or the suchlike situation in being independent of fuse clip together with following, and it itself is creative being regarded as.

Therefore, another basic conception of the present invention is to recognize that hook guard needn't center on fuse with clamping, so that guarantee excellent contact.Or rather, be regarded as enough be: so arrange the metal foil slip, so that the fixing of end side is set in an end of metal foil slip and supporting is set in another end of metal foil slip, so that realize that in zone line wherein the metal foil slip can be out of shape in predefined mode to the compressing of fuse.At this, even the only one-sided loss that fixedly causes when carrying out the change of fuse of repetition, also can not occurring contacting thrust.Therefore, not only easy change of fuse, and when often carrying out change of fuse, also can not cause degenerating of contact performance.

The metal foil slip can be by brass and can be made of special steel equally.It is particularly advantageous using brass, because brass material popular in electronics industry, that especially accepted immediately when approval process.Alternatively, can especially construct the metal foil slip with special steel.

Hook guard of the present invention preferably uses when contact fuse or fuse, as it as the replacing fuse in the electric device or common in the particular country such as Britain.Usually, the fuse in this type of fuse is connected at that part of upper contact that is positioned on the cylinder blanket of metal end caps or rather at the glass tube end cap place of metal contacting.

The metal foil slip is fixed on the substrate of hook guard usually, and this substrate can or like thatly constitute with electric device, attaching plug equally integratedly.The isolated of metal foil slip fixedly allowed metal foil slip slightly deformed when fuse is compacted, so that obtain fully big contact pressure in the position that fuse is fixed to coupling the time.If not considering turns up the soil at interval the metal foil slip is fixed on the substrate, can also for example in fully flexible substrate, differently reaches this type of spring effect so.

Preferably, so support the metal foil slip at fixing offside (promptly another end of the metal foil slip), so that the metal foil slip can move well and be bearing in especially movably there there.One preferred embodiment in, so construct hook guard, so that the overall bearing of trend that the metal foil slip can be along its surface of moving towards the metal foil slip tilts.This makes it possible to be provided with the bending of metal foil slip, and this bending causes better thrust by spring effect.

The metal foil slip has contact area usually, the metal foil slip on this contact area generally speaking corresponding to the fuse profile.This has guaranteed that fuse reaches roughly the same position all the time, and has therefore guaranteed reproducible especially well characteristic.Preferably, the metal foil slip is generally to extend with the tangent mode of the rotating element that carries fuse.This makes it possible to fuse is screwed in the use location and screw out from the use location by rotating element.Therefore, the user can change fuse simply.

It should be noted that, although discussed herein is the metal foil slip, but the bars that in fact can relate to big element for example can also be curled, weld or fixing twisted wire or can be provided with and being connected of plug pin with this bars otherwise by this bars.Shall also be noted that when plug pin is configured to stamping parts, can realize integrated manufacturing in case of necessity with the metal foil slip zone of design according to the present invention.Fixing can by welding with plastic feet realize of metal foil slip on the one side for example sprayed the perforation of plastic material by being arranged on when producing matrix via it in the metal foil slip.But this is fixing also can realize by clamping or by form fit (for example retaining device by the convex shoulder location and like that).As can estimating, importantly prevent the complete displacement movement of metal foil slip.Also possible in addition is that in the position of not supporting the metal foil slip regularly, side direction guides this metal foil slip at least.Should be noted in the discussion above that equally can be where necessary the stop by the twisted wire place realize fixing or to be fixed on the plug pin place just enough.

Alternatively and/or additionally, can also promptly be arranged on the end contact fuse of the metal end caps on the fuse both sides usually at end face side contacts fuse.Equally, this itself also is regarded as in the mode that is independent of Turnlock fastener creative.At this, under to the enough big situation of the thrust of the contact of end face side, fuse is only connected just enough at these surperficial upper contacts.This is preferred, because can realize simple especially dead lock motion thus.If should use fuse contact element traditional, that be generally the bending of C shape, fuse must be pushed these fuse contact elements from C shape open side so, promptly move to translation in these fuse contact elements.But in principle, design according to the present invention also is feasible in this type games.Yet particularly preferably be, design dead lock in rotating mode.In this type of situation, can reach especially simply design by the mode of only carrying out fuse contact in the end face side.Can also realize contact by the cylindrical surface of metal end caps even should be pointed out that equally under rotating rotating especially restrictedly dead lock situation to fuse.

If dead lock is rotating, this has realized the simple especially and compact structure according to precision instrument fuse equipment of the present invention so.Especially, dead lock can around with the rotational of fuse off-centre, wherein dead lock needn't force to turn over an above full circle or full circle only, but can preferably for example turn over (360 ° full circle in) 270 ° only limitedly.

Especially the dead lock in the rotating design can be installed in the side of the fuse end face that comes out from fuse shell (for example, the plug handle body of supporting fuse).This type of layout has been saved structure height.

Taking-up to fuse can realize in the axial direction that fuse for example moves in opening the place ahead according to the type of the fusible link in the rotating cylinder with Turnlock fastener for this reason.Alternatively, the taking-up that makes progress of footpath also is possible, and this at first controls under the situation that plug uses normally preferred at dead lock simultaneously by its position.

Though fuse equipment of the present invention in principle can with various types of electric device couplings, particularly preferably be fuse device according to the present invention be used for attaching plug.Obtain plurality of advantages herein, because can realize very smooth structure, this structure has especially realized and the travel plug and the suchlike coupling that for example are used for plug-in power pack part etc.In a particularly preferred execution mode, attaching plug is the GB standard design, promptly is for the popular plug design of Britain.It is folding that these plugs can be configured to.

Also obtain many preferentially under this type of plug situation, because can not reach the fuse contact during change of fuse, this can cause protecting simultaneously these fuse contacts to avoid distortion or deliberate damage.

Can especially use fuse equipment in following situation: attaching plug has movably element thereon, this movably element must in correct position, aim at ground insert socket so that cause the release of electric energy.In this type of situation, utilize fuse device of the present invention can reach by the design of dead lock: as long as dead lock does not cut out, this element just can not move in the energy off-position so.Groove can be set in dead lock, movably the bead of element must enter this groove for this reason, so as to make this movably element move in the off-position.This is independent of the way of contact, promptly all is suitable at resilient fuse bar and under the situation of the end face of side contact.Alternatively and/or additionally, can automatically lock dead lock by the element that must move in the energy off-position.For this reason, the frosting that moves with this element of slip or like that can be set with overlapping each other in the inside of handle body.

The attaching plug that is equipped with fuse of the present invention does not preferably have fuse in the plug pin side that it points to socket side.

Should be pointed out that patent documentation US 7,160,124 and the US7 of the Bhutani that the beginning part is mentioned, 144,266 and the patent documentation WO 2007/113541 of Yalcin specially suitable attaching plug body has been described, wherein can use fuse device of the present invention.

Description of drawings

The present invention is below only for example described with reference to the accompanying drawings.Accompanying drawing illustrates:

Fig. 1 a: have exploded view according to (folding) attaching plug of hook guard of the present invention,

Fig. 1 b: from another visual angle depiction 1a,

Fig. 2: the sectional view of the plug by Fig. 1 and the vertical view of hook guard,

Fig. 3: according to the fuse device that is used for the flat plug of British Standard of the present invention,

Fig. 4 a, Fig. 4 b: the dead lock of fuse device of the present invention be close to and reach before the contact position (Fig. 4 a) and in the change of fuse position (Fig. 4 b),

Fig. 5 a: preferred implementation that is used under the dead lock situation of not closing fully, preventing current drain.

Embodiment

According to Fig. 1, be implemented as herein in the foldable plug of electric device of GB standard, general comprise the metal foil slip 3 that is used for contact fuse 4 through fixing with 1 hook guard of representing, wherein metal foil slip 3 is fixed on the 3a of side and is bearing in 3b place, position and is formed at contact fuse among the regional 3c between these both sides at relative opposite side in a side.Should be noted that attaching plug 2 has hook guard of the present invention, this hook guard has two metal foil slips constructed according to the invention, and wherein the sectional view of Fig. 2 shows the cross section of the second metal foil slip 5.In Fig. 1 b, can see metal foil slip 5 corresponding, contact fuse better.

Hook guard 1 is used to contact fuse (that is, fuse) herein, as it Britain must be set in the plug.Hook guard 1 is surrounded fully by shell that is made of two and half outer cover 2a, 2b and the fuse clip 6 that is rotatably supported in this shell herein, so that there is not the danger of the contact (that is metal foil slip) that reaches hook guard for the user.Especially can predict from Fig. 2, so design and support fuse clip 6, so that after having merged these half outer covers, can not from the shell of attaching plug 2, remove hook guard and can not touch metal foil slip 3 (or 5) from the outside.Should be noted that and to come locking fuse clip 6 by the locking member 2a1 that is arranged on shell half outer cover 2a place.This further helps the fail safe of hook guard.

Other elements are arranged on other elements of the locking mechanism such as element 2a2,2a3 in the socket in particular for unblocking, be not theme of the present invention and describe in other places.

The layout that should be pointed out that hook guard also is not limited to described attaching plug, and the layout of this hook guard in any type of electric device all is significant.

Come punching press and folded foil bar 3 (or 5) with brass herein, but the use of other materials is possible too.Should point out the availability of special steel clearly.One of metal foil slip has contact 3d on a side, utilize this contact that this metal foil slip is contacted with plug pin 7a.In order to contact another plug pin 7b one metal foil slip is set, this metal foil slip passes through according to device of the present invention from the side and leads to wire guide plate.This another metal foil slip according to the present invention has the curled regions 5f that is used for stop power conductor twisted wire 8 in the end away from the fuse zone, with reference to Fig. 2.Therefore fix in a different manner or support two metal foil slips of hook guard and so arrange them in addition, so that they are electrically connected by fuse.

The metal foil slip 3 that is positioned at the back among Fig. 1 fixes by two reclinate bending thing 3a1,3a2 at the contact position 3d place near plug pin 7a, the bottom of these bending things 3a1,3a2 and half outer cover 2b is (not shown, because the corresponding protuberance collaborative work the back at this protuberance) connects the direction motion of terminal 2c to avoid this metal foil slip towards the power supply twisted wire.This metal foil slip (that is, being depicted as the side back to socket of the electric device of attaching plug herein) on the direction that connects side 2c towards power supply is provided with movably supporting on the surperficial 3b of swing.This bearing-surface is similar to as among Fig. 2 the bearing-surface about 2b1 of metal foil slip 5 being described.

Another metal foil slip leads to the curled end 5f that power supply connects twisted wire from fuse.On a side of this twisted wire and at the another side of fuse contact position 5c, also be provided with bearing position 5c, in addition, fixedly be not only by twisted wire and realize, but also realize by the metal foil slip being clamped in clamped position 5a1 place.

Further describe the type of fixing type, supporting and the shaped design of metal foil slip 5 referring now to Fig. 2.Fig. 2 shows a cross section, this cross section so far is positioned at the inside of attaching plug shell, so that the metal foil slip that leads to twisted wire from second plug pin no longer is shown, but only can see from terminal horizontal outward extending bead 5g of 5d of plug pin and twisted wire connection.Therefore, be freely to a great extent to observation according to design of the present invention.

In the present embodiment, on the one hand by terminal 5f being crimped onto power supply twisted wire 8 places and clamping also fixing metal strip of foil thus at sagging element 2a2 and the locking device place among the regional 5a1 between the abutment element 2b1 of first outer cover 2a on the other hand.Half outer cover 2a, 2b are so approaching in the zone of clamping device 5a1, and row replacement adds fixedly effect to sheet metal so that come by this sagging element.Metal foil slip 5 is with mode (with reference to the camber line 5h) swing of the shell half outer cover 2b below at first making progress, leave subsequently from clamped position 5a1, so that drop to the curved surface with camber line 5i once more from its peak, this curved surface roughly is complementary with the radius 4a2 of the metal end caps 4a1 of fuse 4.The metal foil slip leads to bearing position 2b1 towards the direction swing of the shell half outer cover 2a of top until peak 5j and with back curve shape ground subsequently.Peak 5h and 5j occupy roughly the same height about shell half cover of below, thereby are close to the metal end caps 4a1 of fuse 4 well.

As from accompanying drawing as seen, bearing-surface 2b1 slightly towards the overall bearing of trend of metal foil slip tilt and metal foil slip 5 profile with camber line shape tilts to be complementary therewith from the top.At this, up or make the support region 2b of this bearing-surface circular in the front region equally, so that by making metal foil slip 5 can on bearing-surface 2b1, move the radius 4a2 of the slight variation of allowing the fuse of being changed 4.

In use, can the fuse that insert at first be moved to the extracting position from its use location by the mode that makes fuse clip 6 Rotate 180s °.In extracting position, can under the situation of no active force, take out fuse, for example by the rotating handle body so that the mode that fuse drops out.

Can insert new fuse subsequently, and by fuse clip 6 rotations are moved to new fuse on metal foil slip 3 or 5 until the mode of locked position of coupler.In the case, metal foil slip 3 or 5 is close to fuse, and by described fixing can make to move only or basically mainly occur in the bearing position relative (for example 2b1) and locate with the fixed position.(this subsequent corrosion realizes the angle [alpha] between 90 ° and 30 ° to the S shape camber line profile of the small curvature radius shown in having by sheet metal bar segment described herein, the metal foil slip is close to fuse along this angle), can realize less contact resistance and therefore especially even under realize less fuse heating, although can easily replace this fuse by the situation of big electric current.

Referring now to Fig. 3-Fig. 5 another execution mode is described.

According to Fig. 3, the general fuse device of representing with II ' 1 that is used for attaching plug comprises the contact II ' 2a that is used to contact removable fuse II ' 3, II ' 2b and realize the dead lock II ' 4 that fuse is changed, this dead lock II " 4 are constructed such that fuse II ' 3 is between the contact position of these contacts of contact and the change of fuse position that hides these contacts at least to a great extent mobile (Fig. 4 b).

In this situation, fuse device II ' 1 is built into attaching plug II ' 8 places, as its in Britain employed.In Britain, must originally be at attaching plug fuse is set.This external Britain, only just can be from socket when plug pin being inserted all three openings of socket release current.In the case, in fact the 3rd plug pin that is often used as grounding leg itself needs not to be conduction.Only need this tripod to come release current.Therefore, described the GB plug in an illustrated embodiment, wherein the 3rd plug pin constitutes with plastics.In order to cause this release, shown plug pin II ' 5 is disposed in slewing equipment II ' 5a, II ' 5b, II ' 5c place, also can be with reference to Fig. 5.

In this situation, contact II ' the 2nd, rammed with the sheet metal of conduction, wherein one of these contacts II ' 2a directly is connected with plug pin II ' 6a conduction and another contact II ' 2b leads to restraint twisted wire II ' 7, and wherein this restraint twisted wire II ' 7 is stopped at curling connection II " 7a place once more.Second conductive plug pin II ' 6b is connected by the conductor element II ' 8 that constitutes with sheet metal equally is connected twisted wire II ' 7 with power supply another heart yearn, and this heart yearn is curled at crimped position II ' 7b place equally for this reason.

Fuse II ' the 3rd has traditional fuse of suitable allowable load and usually has vitreum between metal end caps II ' 3a, II ' 3b and this two metal end caps in the end face side.

Contact II ' 2a, II ' 2b are so constructed so that to end face (fully big with reference to II ' thrust 3b1) so that the electric current that carrying enduringly allows under the situation of not significant (that is, dangerous or not tolerable) heating.

Dead lock II ' the 4th constitutes in rotating mode, as by as indicated in the rotation arrow II ' 9.For the ease of rotating, dead lock is provided with rill II ' 4a in the place that can reach this dead lock by the opening II ' 10 among attaching plug shell II ' 11a on its outer surface at least in part.

Dead lock II ' 4 can rotate between locked position of coupler (with reference to Fig. 4 a, it illustrates dead lock complete atresia not as yet) and change of fuse position (with reference to Fig. 4 b).In an illustrated embodiment, be provided with bearing II ' 11b1, II ' 11b2 through rounding in attaching plug outer cover II ' 11b, dead lock can rotate on this bearing.Dead lock is so constructed, so that can not remove this dead lock under outer cover on the attaching plug and the merged situation of following outer cover, but for good and all keeps and while this dead lock of rotatably support.In dead lock II ' 4, be provided with groove II ' 4b, the profile phase of this groove II ' 4b and fuse II ' 3 mates and can carry fuse II ' 3 between contact position and extracting position when double-head arrow II ' 9 directions is rotated dead lock, in this contact position, the end face of fuse II ' 3 contacts with contact II ' 2a, II ' 2b, and in this extracting position, can reach fuse II ' 3 by the opening of attaching plug shell II ' 10 to carry out change of fuse.In the embodiment shown, dead lock II ' 4 also has groove II ' 4c, when both sides that dead lock II ' 4 is in fuse wherein by the contact position of contact II ' 2 contacts in the time, this groove II ' 4c can with unblock pin or discharge the bead II ' 5d collaborative work of pin.This collaborative work is so design, so that bead II ' 5d can enter groove II ' 4c under the situation that dead lock is correctly aimed at and make release pin II ' 5 can change over to therein and attaching plug can be inserted in the location of standard compliant socket thus, and correctly do not change under the situation of contact position at dead lock, will discharging pin II ' 5, to change the off-position over to be impossible.In contact position, can not reach contact II ' 2a, II ' 2b from the outside, these contacts II ' 2a, II ' 2b are hidden fully.Structurally, this reaches in the example shown in the following way: the contact-making surface by making contact II ' 2a, II ' 2b on the inclined-plane (with reference to II ' 2a1) locate to guide contact-making surface that the mode of leaving the attaching plug wall makes contact II ' 2a, II ' 2b inwardly and the attaching plug wall spaced apart, wherein dead lock II ' 4 protrudes in this handle area I I ' 4a at its handle area I I ' 4a place.This realizes herein in the following way: not exclusively construct dead lock II ' 4 solidly, but so construct dead lock II ' 4 so that can not touch or push slight upcountry from the outstanding contact-making surface of wall when rotating.

Following use has the attaching plug of fuse device of the present invention:

At first, under being arranged in the situation of contact position, fuse will discharge that pin moves to the off-position and with plug insertion socket.

In the time must switching during use and change fuse, at first pulling the plug out of the socket and making discharges pin and is rotated away from dead lock, so that dead lock is unblocked, because lug boss II ' 5d no longer enters groove II ' 4c.Can make fuse change the change of fuse position over to by rotating dead lock now, change fuse and dead lock is rotated back in the contact position, after this can be transferred in the correct position discharging pin again.Owing in the off-position, hidden contact, thereby can not reach these contacts, this for the children that play through the attaching plug place that inserts and like that for also be like this.

According to use, plug can move back in the smooth inactive state.Should be understood that, though above usefulness has the pin that unblocks (as being exactly this situation) of two joints in PCT application WO 2007/113541 the present invention is described, but can also use the pin such as discharging pin to use the present invention immediately, this release pin is inserted in its off-position or with unique joint or plural joint and is transferred in the off-position, with reference to the patent documentation of being quoted in the background parts.

Claims

1. fuse device, it has and is used to the dead lock that carries fuse that contacts the contact of removable fuse and realize described change of fuse, it is characterized in that, described dead lock be constructed such that described fuse the contact position of the described contact of contact with hide at least to a great extent between the change of fuse position of described contact mobile.

2. as the described fuse device of last claim, it is characterized in that described contact is formed at the described fuse of end face side contacts.

3. as the described fuse device of last claim, it is characterized in that described contact is configured to only at the described fuse of end face side contacts.

4. as described fuse device in the above claim, it is characterized in that described dead lock can rotate.

5. as the described fuse device of last claim, it is characterized in that described dead lock can center on the rotational with the fuse eccentric axis.

6. as one of preceding two claims described fuse device, it is characterized in that described dead lock can rotate limited angle.

7. as described fuse device in the above claim, it is characterized in that described dead lock can rotate and be less than a full circle.

8. as described fuse device in the above claim, it is characterized in that described dead lock is bearing in the side of described fuse end face.

9. as described fuse device in the above claim, it is characterized in that described dead lock has the opening that is used for taking out towards radial direction described fuse.

10. attaching plug that has as a described fuse device in the above claim.

11., it is characterized in that described attaching plug is used for the electronic equipment according to the GB standard as the described attaching plug of last claim.

12. as one of preceding two claims described attaching plug, it is characterized in that, described attaching plug have at least one movably, can insert the element of socket for voltage discharges, wherein said dead lock is so constructed, and enters the motion fully of off-position so that described dead lock is forbidden described releasing member outside the contact position situation.

13., it is characterized in that the plug end face that points to described socket does not have fuse as described attaching plug in the above claim.

14. one kind especially as described hook guard in the above claim, it has through the fixing metal foil slip that is used for contact fuse, it is characterized in that described metal foil slip is fixed on a side, is supported in relative opposite side and is provided in contact fuse in the zone line.

15., it is characterized in that described metal foil slip constitutes with brass and/or special steel as the described hook guard of last claim.

16., it is characterized in that described hook guard is configured to contact fuse as described hook guard in the above claim.

17. as the described hook guard of last claim, it is characterized in that described hook guard is formed at the glass tube end cap place contact fuse of metal of the end face side of fuse.

18., it is characterized in that described metal foil slip is to be fixed with the isolated mode of substrate as described hook guard in the above claim.

19. as described hook guard in the above claim, it is characterized in that, described metal foil slip is bearing on the described substrate, so that the zone line between the supporting of the fixing and opposite side of end side is with described substrate is spaced apart and especially bridge shape ground extension between fixing and movably supporting with so raising.

20., it is characterized in that described metal foil slip is in a movable manner, especially is supported in movable mode as described hook guard in the above claim.

21., it is characterized in that be used for the overall bearing of trend inclination of the bearing of described metal foil slip towards described metal foil slip, described metal foil slip end moves along described bearing as described hook guard in the above claim.

22. as described hook guard in the above claim, it is characterized in that described metal foil slip has contact area, described metal foil slip is complementary with the fuse shape in described contact area.

23. as described hook guard in the above claim, it is characterized in that described metal foil slip is to extend with the substantially tangent mode of the rotating element that carries fuse.

24. as described hook guard in the above claim, it is characterized in that, be provided with two parallel metal foil slips that are used for contact fuse.